An SSD in standard 2.5-inch (64 mm) form-factor DDR SDRAM based SSD
PCI attached IO Accelerator SSD
PCI-E / DRAM / NAND based SSD
A solid-state drive (SSD) is a data storage device that uses solid-statememory to store persistent data. SSDs are distinguished from traditional hard disk drives (HDDs), which are electromechanical devices containing spinning disks and movable read/write heads. SSDs, in contrast, use microchips and data is retained in non-volatile memory chips[1] and contain no moving parts.[1] Compared to traditional HDDs, SSDs are typically less susceptible to physical shock, quieter, and have lower access time and latency. SSDs use the same interface as hard disk drives, thus easily replacing them in most applications.[2]
As of 2010, most SSDs use NAND-based Flash memory, which retains memory even without power. SSDs using volatile random-access memory (RAM) also exist for situations which require even faster access, but do not necessarily need data persistence after power loss, or use batteries to back up the data after power is removed.[2] Secure digital cards are particularly simple and inexpensive SSDs though an equally inexpensive USB flash memory adapter may be needed to attach it if the computer does not have a built-in SD flash memory card reader(/writer). These cards can bootlive SD operating systems (see Applications).
A hybrid drive combines the features of an HDD and an SSD in one unit.
Mrs. Arrington-Steele says: Solid-state drives, for all intents and purposes, differ from hard disk drives in the lack of moveable parts. The information is just there, same as it might be on a USB flash drive, though has a much faster connection interface. Not having to search the different platters as a hard disk drive does speeds up data retrieval nearly 100 times faster (0.1 ms vs. 10 ms), depending on the drives being compared. Also, defragmentation is not an issue with solid-state drives as information is no longer stored in different 'physical' locations. Solid-state drives are currently about $1.50 - $2.00 per GB, making them rather expensive when a 1TB hard disk drive sells for around $50 (2010/11/17).
Solid-state drive
From Wikipedia, the free encyclopediaAn SSD in standard 2.5-inch (64 mm) form-factor
DDR SDRAM based SSD
PCI attached IO Accelerator SSD
PCI-E / DRAM / NAND based SSD
A solid-state drive (SSD) is a data storage device that uses solid-state memory to store persistent data. SSDs are distinguished from traditional hard disk drives (HDDs), which are electromechanical devices containing spinning disks and movable read/write heads. SSDs, in contrast, use microchips and data is retained in non-volatile memory chips[1] and contain no moving parts.[1] Compared to traditional HDDs, SSDs are typically less susceptible to physical shock, quieter, and have lower access time and latency. SSDs use the same interface as hard disk drives, thus easily replacing them in most applications.[2]
As of 2010, most SSDs use NAND-based Flash memory, which retains memory even without power. SSDs using volatile random-access memory (RAM) also exist for situations which require even faster access, but do not necessarily need data persistence after power loss, or use batteries to back up the data after power is removed.[2]
Secure digital cards are particularly simple and inexpensive SSDs though an equally inexpensive USB flash memory adapter may be needed to attach it if the computer does not have a built-in SD flash memory card reader(/writer). These cards can boot live SD operating systems (see Applications).
A hybrid drive combines the features of an HDD and an SSD in one unit.
Mrs. Arrington-Steele says: Solid-state drives, for all intents and purposes, differ from hard disk drives in the lack of moveable parts. The information is just there, same as it might be on a USB flash drive, though has a much faster connection interface. Not having to search the different platters as a hard disk drive does speeds up data retrieval nearly 100 times faster (0.1 ms vs. 10 ms), depending on the drives being compared. Also, defragmentation is not an issue with solid-state drives as information is no longer stored in different 'physical' locations. Solid-state drives are currently about $1.50 - $2.00 per GB, making them rather expensive when a 1TB hard disk drive sells for around $50 (2010/11/17).